TIDA-00178

Interface to a Sin/Cos Encoder with Sitara AM437x Reference Design

TIDA-00178

Design files

Overview

The TIDA-00178 reference design is an EMC compliant industrial interface to Sin/Cos position encoders. Applications include industrial drives, which require accurate speed and position control.

The design utilizes a 16-bit dual sample ADC with drop-in compatible 14- or 12-bit versions available, allowing for optimization of performance and cost. TIDA-00178 provides a direct connection to Sitara AM437x using SPI and QEP. For quick evaluation it features a 60-pin connector which directly fits the AM437x IDK. An example firmware for Sitara AM437x IDK is provided, which outputs the measured angle from the Sin/Cos encoder with up to 28-bit resolution through the Sitara’s USB virtual COM port.

Features
  • EMC Compliant Industrial Interface Design for Sin/Cos Encoders with 1-Vpp Differential Output at 2.5-V Offset, Input Frequencies up to 500-kHz
  • High-Resolution Interpolated Position, up to 28-bits Resolution, Cable Length Tested up to 70m
  • Fully Differential Analog Signal Chain for High Common Mode Noise Immunity with Dual 16-bit ADC with Drop-in Compatible 14- or 12-bit ADC Pending Desired Resolution
  • Easy to Connect to Sitara AM437x with SPI and QEP Interface. Connects directly to AM437x IDK 60-Pin Header
  • Example Firmware for Sitara AM437x with High-Resolution Angle Calculated at 32-kHz and Angle Data Send via USB virtual COM Port for Easy Performance Evaluation
  • Designed for IEC61000-4-2,4-4 and 4-5 (ESD, EFT and Surge EMC Immunity Requirements)

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUA77A.PDF (6385 K)

Reference design overview and verified performance test data

TIDRFV1.PDF (716 K)

Detailed schematic diagram for design layout and components

TIDRFV2.PDF (38 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRFV3.PDF (560 K)

Detailed overview of design layout for component placement

TIDRFV5.ZIP (3022 K)

Files used for 3D models or 2D drawings of IC components

TIDCAL7.ZIP (565 K)

Design file that contains information on physical board layer of design PCB

TIDRFV4.PDF (3990 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

TPS54013.5V to 42V Input, 0.5 A Step Down Converter

Data sheet document-pdfAcrobat PDF open-in-new HTML
Comparators

TLV32025.5-V, high-speed, dual push-pull comparator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Fully differential amplifiers

THS4531AUltra Low Power, RRO, Fully-Differential Amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS717150-mA, high-PSRR, low-IQ, low-dropout voltage regulator with enable

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS799200-mA, low-IQ, low-dropout voltage regulator with low-noise & enable

Data sheet document-pdfAcrobat PDF open-in-new HTML
Noninverting buffers & drivers

SN74LVC3G173-ch, 1.65-V to 5.5-V buffers with Schmitt-Trigger inputs

Data sheet document-pdfAcrobat PDF open-in-new HTML
Precision ADCs (<=10MSPS)

ADS8354Dual 700kSPS 16-Bit Simultaneous-Sampling SAR Analog-to-Digital Converter (ADC)

Data sheet document-pdfAcrobat PDF open-in-new HTML
Series voltage references

REF20258-ppm/°C drift, low-power, dual-output Vref & Vref/2 voltage reference

Data sheet document-pdfAcrobat PDF open-in-new HTML

Start development

Software

Support software

TIDA-00178 Sin/Cos Encoder AM437 Software – TIDCAL8.ZIP (38 K)

Technical documentation

star
= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 2
Type Title Date
* Design guide Interface to a Sin/Cos Position Encoder With Sitara AM437x Design Guide (Rev. A) Sep. 14, 2015
Technical article Designing an EMC-compliant interface to motor position encoders – Part 5 Nov. 10, 2015

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​

Videos